package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import nonapi.io.github.classgraph.utils.Join;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

/**
 * 自定义切面
 */

@Aspect
@Slf4j
@Component
public class AutoFillAspect {

    //切入点
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointCut(){}


    @Before("autoFillPointCut()")
    public void autoFill(JoinPoint joinPoint){
        //得到注解
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
        AutoFill autoFill = signature.getMethod().getAnnotation(AutoFill.class);
        OperationType operationType = autoFill.value();

        //获取实体对象
        Object[] args = joinPoint.getArgs();
        if(args == null || args.length == 0){
            return;

        }

        Object entity = args[0];

        //准备复制的数据
        LocalDateTime localDateTime = LocalDateTime.now();
        Long currentId = BaseContext.getCurrentId();

        //根据操作类型复制
        if(operationType == OperationType.INSERT){
            //赋值4个属性
            try {
                Method setCreateTime = entity.getClass().getDeclaredMethod("setCreateTime", LocalDateTime.class);
                Method setCreateUser = entity.getClass().getDeclaredMethod("setCreateUser", Long.class);
                Method setUpdateTime = entity.getClass().getDeclaredMethod("setUpdateTime", LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod("setUpdateUser", Long.class);
                setCreateTime.invoke(entity , localDateTime);
                setCreateUser.invoke(entity , currentId);
                setUpdateTime.invoke(entity , localDateTime);
                setUpdateUser.invoke(entity , currentId);

            } catch (Exception e) {
                e.printStackTrace();
            }


        }else if(operationType == OperationType.UPDATE){
            //赋值两个属性
            //赋值4个属性
            try {
                Method setUpdateTime = entity.getClass().getDeclaredMethod("setUpdateTime", LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod("setUpdateUser", Long.class);
                setUpdateTime.invoke(entity , localDateTime);
                setUpdateUser.invoke(entity , currentId);

            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

}
